97 kx125 crank

im really worried my crank bearings are going bad, since the bike is about 11 years old and i dout they have been replaced, what exactly am i looking for when looking at the crank? the cylinder is off atm. how can i measure it or test it?

if they are bad, do i need any special tools like a press to get the crank out of the case? i think the bearings under the connecting rod are bad but im not completely sure.

All of your answers are here in this forum. You just have to search for it. Ed (no1clyde) made a couple great posts concerning bottom ends. Check those out as well.

you guys thing it would be cheaper to get a rod bearing? or a compete kit.

Do you have a set of feeler gauges?

i do, but idk what the max limit is on the movement.

took a while but i found the service limit, which is .70mm. mines only @ .55, and the up and down problem is solved. it wasnt the crank moving up and down it was the piston moving back and forth . i just wasnt looking good. just waiting on that stud bolt not,

went to fastenal, talked to the guy and the single helicoil install took is $150. and a kit is $55. how gay. but ill see what i can do. dads off on paid vacation all next week and im sure we can get something done. :thumbsup:

were good to go guys! the helicoil i got previously was to big, and i bought a kit with the right size. and BAM a new cylinder =]

runs good, doing break in when it cools down outside.

good to hear

crap!!! just when i decide to look to help someone. i find a problem i know all about. then its already solved :ride: but glad you fixed it:thumbsup:

good deal, good to hear it is back together

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By luke8500
      Hi all,
      I have a 2004 Kawasaki kx250 that died suddenly on me the other day. all i can get it to do is backfire every once in awhile. Tested the resistance and everything of the magneto and stator with a multi-meter and all is good.  Coil is new oem Kawasaki the reeds are brand new vforce and the top end and carb have been completely rebuilt.  key on crank is intact and all the timing marks are lined up. I hooked a timing light to it and spun the motor over really fast and found that it is sparking way to late.  The service manual says that it is supposed to fire 14 degrees before TDC but it is sparking way after TDC.  Im thinking its a fried CDI box since its the only thing i wasnt able to check.  Any help would be appreciated
    • By luke8500
      Hi all,
      I have a 2004 kx 250 2 stroke and it wont start.  it only backfires.  I was out riding it one day and came up to a stop so the bike was just idling and it started to try and die so i revved it up a few times then let it die and now it wont start back up.  It only pops or backfires when you kick it.  Its getting good spark and i just put a brand new plug and coil in it. I took the reeds apart and they look like they're brand new.  It was running great before so i dont know what happened.  Im thinking it could be a fuel problem even tho the plug is a little wet if you take it out after a bunch of kicking.  Any help would be greatly appreciated 
    • By Zach121
      Alright, found three bikes all located where i live in Texas. I know they're all very different, but if you could tell me what you think each bike is worth, and which one would be the best deal. Thanks.
      Notes: Both 2 strokes have new top ends. I think the front brake lever is broken on the kawasaki.
      KX250 2002 $800-$1000?

      YZ125 2000 $1250

      KTM 400SX 2002 $1200

    • By Ryan Turner
      So I'm at a bit of a cross roads, I currently own a 06 rm250 and I love it. I also have a 02 kx250 which I'm selling with intent to buy a newer two stroke. I can't afford a newer ktm and the older ones aren't that great and kawasaki never impressed me. so I'm stuck between 06 yz250 and 05 cr250. I've heard the yz and rm after 06 are almost the same bike just the Suzuki handles better and the Yamaha has better suspension. So I'm not sure if I wanna buy carbon copy of my bike with slight differences. That's why I'm interested in a cr250 I heard the 02+ models RC valves are shit garbage but was mostly fixed in the 05-07 models. I ride at a track and at some bogs down the road from me. So from people who have owned both, what would you recommend. I know the cr is known for a hard hitting power band which I enjoy since im an aggressive rider. Should i just see which deal comes my way first.
    • By dirtbikesrule
      If you own a 2 stroke dirtbike,please reply once. Im just wondering how many people on this site have them.